static nxt_error_t
nxt_flash_alter_lock(nxt_t *nxt, int region_num,
enum nxt_flash_commands cmd)
{
nxt_word_t w = 0x5A000000 | ((64 * region_num) << 8);
w += cmd;
NXT_ERR(nxt_flash_wait_ready(nxt));
/* Flash mode register: FCMN 0x5, FWS 0x1
* Flash command register: KEY 0x5A, FCMD = clear-lock-bit (0x4)
* Flash mode register: FCMN 0x34, FWS 0x1
*/
NXT_ERR(nxt_write_word(nxt, 0xFFFFFF60, 0x00050100));
NXT_ERR(nxt_write_word(nxt, 0xFFFFFF64, w));
NXT_ERR(nxt_write_word(nxt, 0xFFFFFF60, 0x00340100));
return NXT_OK;
}
static nxt_error_t
nxt_flash_block(nxt_t *nxt, nxt_word_t block_num, char *buf)
{
// Set the target block number
NXT_ERR(nxt_write_word(nxt, 0x202300, block_num));
// Send the block to flash
NXT_ERR(nxt_send_file(nxt, 0x202100, buf, 256));
// Jump into the flash writing routine
NXT_ERR(nxt_jump(nxt, 0x202000));
return NXT_OK;
}
static nxt_error_t
nxt_flash_prepare(nxt_t *nxt, int unlock)
{
// Put the clock in PLL/2 mode
NXT_ERR(nxt_write_word(nxt, 0xFFFFFC30, 0x7));
// Unlock the flash chip
if (unlock) NXT_ERR(nxt_flash_unlock_all_regions(nxt));
// Send the flash writing routine
NXT_ERR(nxt_send_file(nxt, 0x202000, flash_bin, flash_len));
return NXT_OK;
}
